Abstract
THE vibrational relaxation rate of nitric oxide seems to decrease1 with increasing temperature in the range 100–433 K. These results, in conjunction with shock-tube data2 at 1,500 K and above, were taken to imply that there is a minimum in the relaxation rate at about 700 K. We have now studied the vibrational relaxation of pure nitric oxide behind incident shock waves in the range 500–1,900 K. Vibrational relaxation of the shocked gas was monitored by measurements of the postshock density gradient with a laser beam deflexion technique3. Our results suggest that a minimum relaxation rate occurs in the approximate range 300–500 K.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on SpringerLink
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Billingsley, J., and Callear, A. B., Nature, 221, 1136 (1969).
Wray, K. L., J. Chem. Phys., 36, 2597 (1962).
Kiefer, J. H., and Lutz, R. W., J. Chem. Phys., 44, 658 (1966).
Lutz, R. W., and Kiefer, J. H., Phys. Fluids, 9, 1638 (1966).
Bauer, H. J., and Sahm, K. F., J. Chem. Phys., 42, 3400 (1965).
Bradley, J. N., and Lewis, D., J. Chem. Phys., 50, 544 (1969).
Robben, F., J. Chem. Phys., 31, 420 (1959).
Cottrell, T. L., and McCoubrey, J. C., Molecular Energy Transfer in Gases, 74 (Butterworths, London, 1961).
Basco, N., Callear, A. B., and Norrish, R. G. W., Proc. Roy. Soc., A, 260, 459 (1961).
Bauer, H. J., Kneser, H. O., and Sittig, E., J. Chem. Phys., 30, 1191 (1959).
Hochanadel, C. J., Ghormley, J. A., and Ogren, P. J., J. Chem. Phys., 50, 3075 (1969).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
BRESHEARS, W., BIRD, P. Vibrational Relaxation of Nitric Oxide at 500–1,900 K. Nature 224, 268 (1969). https://doi.org/10.1038/224268a0
Received:
Issue date:
DOI: https://doi.org/10.1038/224268a0
